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<title lang=en>Cretaceous mantle exhumation in the central Pyrenees: New constraints from the peridotites in eastern Ariè ge (North Pyrenean zone, France)</title>
<creator>De Saint Blanquat, Michel</creator>
<creator>Bajolet, Flora</creator>
<creator>Grand 'homme, Alexis</creator>
<creator>Proietti, Arnaud</creator>
<creator>Zanti, Matthieu</creator>
<creator>Boutin, Alexandre</creator>
<creator>Clerc, Camille</creator>
<creator>Lagabrielle, Yves</creator>
<creator>Labaume, Pierre</creator>
<contributor>Géosciences Environnement Toulouse (GET) ; Institut de Recherche pour le Développement (IRD) - Université Paul Sabatier - Toulouse 3 (UPS) - Observatoire Midi-Pyrénées (OMP) - Centre National de la Recherche Scientifique (CNRS)</contributor>
<contributor>Géosciences Montpellier ; Université des Antilles et de la Guyane (UAG) - Institut national des sciences de l'Univers (INSU - CNRS) - Université de Montpellier (UM) - Centre National de la Recherche Scientifique (CNRS)</contributor>
<contributor>Institut des Sciences de la Terre (ISTerre) ; Université Joseph Fourier - Grenoble 1 (UJF) - Institut Français des Sciences et Technologies des Transports, de l'Aménagement et des Réseaux (IFSTTAR) - Institut national des sciences de l'Univers (INSU - CNRS) - Institut de recherche pour le développement [IRD] : UR219 - PRES Université de Grenoble - Université Savoie Mont Blanc (USMB [Université de Savoie] [Université de Chambéry]) - Centre National de la Recherche Scientifique (CNRS)</contributor>
<contributor>Institut de recherche en astrophysique et planétologie (IRAP) ; Université Paul Sabatier - Toulouse 3 (UPS) - Observatoire Midi-Pyrénées (OMP) - Centre National de la Recherche Scientifique (CNRS)</contributor>
<contributor>Géoazur (GEOAZUR) ; Université Côte d'Azur (UCA) - Centre National de la Recherche Scientifique (CNRS) - Observatoire de la Côte d'Azur - Institut national des sciences de l'Univers (INSU - CNRS) - Université Nice Sophia Antipolis (UNS) ; Université Côte d'Azur (UCA)</contributor>
<contributor>Institut des Sciences de la Terre d'Orléans - UMR7327 (ISTO) ; Bureau de Recherches Géologiques et Minières (BRGM) (BRGM) - Institut national des sciences de l'Univers (INSU - CNRS) - Université d'Orléans (UO) - Centre National de la Recherche Scientifique (CNRS)</contributor>
<contributor>Géosciences Rennes (GR) ; Université de Rennes 1 (UR1) - Institut national des sciences de l'Univers (INSU - CNRS) - Observatoire des Sciences de l'Univers de Rennes (OSUR) - Centre National de la Recherche Scientifique (CNRS)</contributor>
<description>International audience</description>
<source>ISSN: 1631-0713</source>
<source>Comptes Rendus Géoscience</source>
<publisher>Elsevier Masson</publisher>
<identifier>insu-01280502</identifier>
<identifier>https://hal-insu.archives-ouvertes.fr/insu-01280502</identifier>
<identifier>https://hal-insu.archives-ouvertes.fr/insu-01280502/document</identifier>
<identifier>https://hal-insu.archives-ouvertes.fr/insu-01280502/file/1-s2.0-S1631071316000043-main.pdf</identifier>
<source>https://hal-insu.archives-ouvertes.fr/insu-01280502</source>
<source>Comptes Rendus Géoscience, Elsevier Masson, 2016, From rifting to mountain building: the Pyrenean Belt, 348 (2-4), pp.268-278. 〈10.1016/j.crte.2015.12.003〉</source>
<identifier>DOI : 10.1016/j.crte.2015.12.003</identifier>
<relation>info:eu-repo/semantics/altIdentifier/doi/10.1016/j.crte.2015.12.003</relation>
<language>en</language>
<subject lang=en> Breccia</subject>
<subject lang=en> Hyper-extended passive margins</subject>
<subject lang=en> Pyrenees</subject>
<subject lang=en> Lherzolite</subject>
<subject lang=en>Orogenic peridotite</subject>
<subject>[SDU] Sciences of the Universe [physics]</subject>
<subject>[SDU.STU] Sciences of the Universe [physics]/Earth Sciences</subject>
<subject>[SDU.STU.TE] Sciences of the Universe [physics]/Earth Sciences/Tectonics</subject>
<type>info:eu-repo/semantics/article</type>
<type>Journal articles</type>
<description lang=en> We provide new constraints on the modes of mantle exhumation and denudation in the pre-orogenic Pyrenees by investigating the poorly known peridotites located east of the Lherz body, in eastern Ariè ge (Vicdessos, Urs, Bestiac, Caussou and Prades main peridotitic bodies). We show that: (1) numerous peridotite bodies, not described so far, are constituted by decametric to sub-metric outcrops scattered between and around the main outcrops identified by Monchoux (1970); (2) most of the peridotites form blocks and lenses of various sizes, from millimetric monocrystalline grains to hectometric olistoliths, embedded in debris flows involving mainly Mesozoic metasediments; these peridotites can therefore be linked to the S-type peridotites of Lagabrielle et al. (2010), and share similarities with the peridotites of Lherz region (Clerc et al., 2012). All originated from tectono-sedimentary processes associated with mantle exhumation in relation with extreme thinning and breakoff of the continental basement; (3) the various petrographic characters of these peridotites and their heterogeneity in serpentinisation degree imply a peculiar mode of exhumation, which merges mantle fragments inherited from different structural levels; (4) the lack of tectonic structures such as faults and shear planes associated with the ultramafic-rich breccia formation and the presence of neoformation of metamorphic minerals within the matrix preclude their origin as cataclasites related to the Latest Cretaceous and Tertiary Pyrenean contractional deformation. The peridotites of eastern Ariè ge are indisputable witnesses of the presence of an inverted hyper-extended Cretaceous passive margin forming the current North Pyrenean zone. The geometry of the extensional system was complex and probably associated with strike-slip faults and transcurrent motion. ß 2016 The Authors. Published by Elsevier Masson SAS on behalf of Acadé mie des sciences. This is an open access article under the CC BY-NC-ND license (http://creativecommons. org/licenses/by-nc-nd/4.0/).</description>
<rights>http://creativecommons.org/licenses/by-nc-nd/</rights>
<date>2016</date>
<contributor>ANR-11-BS56-0031, PYRAMID, Le Nord des Pyrénées: évaluation intégrée de l'histoire de la Migration des fluides, l'Inversion du rift, le rôle des processus de surface et la Déformation dans un (rétro)prisme orogénique.(2011)</contributor>
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